=per #19688 [2.4.1][PersistentFSM] getting StateTimeout for state wit… (#20266)

* =per #19688 [2.4.1][PersistentFSM] getting StateTimeout for state without timeout after restart

* Added deprecation warning

akka-persistence/src/main/scala/akka/persistence/fsm/PersistentFSMBase.scala

@@ -301,15 +301,15 @@ trait PersistentFSMBase[S, D, E] extends Actor with Listeners with ActorLogging
     handleEvent = stateFunction orElse handleEventDefault
 
   /**
-   * Verify existence of initial state and setup timers. This should be the
-   * last call within the constructor, or [[akka.actor.Actor#preStart]] and
-   * [[akka.actor.Actor#postRestart]].
+   * Verify existence of initial state and setup timers. Used in [[akka.persistence.fsm.PersistentFSM]]
+   * on recovery.
    *
    * An initial `currentState -> currentState` notification will be triggered by calling this method.
    *
-   * @see [[#startWith]]
+   * @see [[akka.persistence.fsm.PersistentFSM#receiveRecover]]
    */
-  final def initialize(): Unit =
+  @deprecated("Removed from API, called internally", "2.4.5")
+  private[akka] final def initialize(): Unit =
     if (currentState != null) makeTransition(currentState)
     else throw new IllegalStateException("You must call `startWith` before calling `initialize`")
 

akka-persistence/src/test/java/akka/persistence/fsm/AbstractPersistentFSMTest.java

@@ -568,8 +568,6 @@ public class AbstractPersistentFSMTest extends JUnitSuite {
                 matchEvent(Leave.class, (event, data) -> stop())
                 .event(GetCurrentCart.class, (event, data) -> stay().replying(data))
             );
-
-            initialize();
             //#customer-fsm-body
         }